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1990 20th European Microwave Conference最新文献

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Microwave Technique for the On-Line Determination of Unburnt Carbon in Fly Ash 微波技术在线测定飞灰中未燃碳
1990 20th European Microwave Conference Pub Date : 1992-08-11 DOI: 10.1109/APMC.1992.672104
N. Cutmore, S. I. Doumit, T. Evans
{"title":"Microwave Technique for the On-Line Determination of Unburnt Carbon in Fly Ash","authors":"N. Cutmore, S. I. Doumit, T. Evans","doi":"10.1109/APMC.1992.672104","DOIUrl":"https://doi.org/10.1109/APMC.1992.672104","url":null,"abstract":"The CSIRO Division of Mineral and Process Engineering has developed a microwave technique for the on-line determination of unburnt carbon in fly ash from coal-fired power stations. A laboratory evaluation of the technique has been made using 20 fly ash samples from six New South Wales and Queensland power stations. The unburnt carbon has been determined over the range 0.1-12 wt% carbon, with r.m.s. errors in the range 0.08 to 0.28 wt% for individual power stations. A plant trial of industrial prototype gauges will be conducted at a New South Wales power station during 1990.","PeriodicalId":248044,"journal":{"name":"1990 20th European Microwave Conference","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125041283","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Cathode Contact Effects in Millimeter-Wave GaAs Transferred Electron Devices 毫米波砷化镓转移电子器件中的阴极接触效应
1990 20th European Microwave Conference Pub Date : 1990-12-01 DOI: 10.1109/EUMA.1990.336110
H. Spooner, M. Howes, C. Snowden
{"title":"Cathode Contact Effects in Millimeter-Wave GaAs Transferred Electron Devices","authors":"H. Spooner, M. Howes, C. Snowden","doi":"10.1109/EUMA.1990.336110","DOIUrl":"https://doi.org/10.1109/EUMA.1990.336110","url":null,"abstract":"Millimetre-wave transferred electron devices have been fabricated with a range of cathode contacts from a Schottky contact to an ohmic contact. DC measurements have shown that the degree of negative differential resistance and the ratio of forward and reverse bias threshold currents can be related directly to the state of the cathode contact. Corresponding rf measurements have shown similar trends in efficiency and `turn-on' performance, suggesting different modes of operation. A novel computer simulation has been developed to investigate these effects.","PeriodicalId":248044,"journal":{"name":"1990 20th European Microwave Conference","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120952902","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dispersion Characteristic of Coupled Inset Dielectric Guides 耦合插入介质波导的色散特性
1990 20th European Microwave Conference Pub Date : 1990-12-01 DOI: 10.1109/EUMA.1990.336225
T. Rozzi, S. Pennock, D. Boscovic
{"title":"Dispersion Characteristic of Coupled Inset Dielectric Guides","authors":"T. Rozzi, S. Pennock, D. Boscovic","doi":"10.1109/EUMA.1990.336225","DOIUrl":"https://doi.org/10.1109/EUMA.1990.336225","url":null,"abstract":"The inset dielectric quide (IDG) represents an easy-to-fabricate alternative to image line that is also less sensitive to loss by radiation at discontinuities. The propagation constants of single and coupled identical IDGs have been calculated under the LSE approximation. The Transverse Resonance Diffraction (TRD) method with variational formulation for impedance operators is used. Measured values show very good agreement with predicted values for the propagation constant of a single IDG and for the coupling coefficient of coupled IDGs.","PeriodicalId":248044,"journal":{"name":"1990 20th European Microwave Conference","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133964271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 11
A Rigorous Procedure for Analysing Microwave Planar Printed Board Antenna Systems 分析微波平面印制板天线系统的严格程序
1990 20th European Microwave Conference Pub Date : 1990-10-01 DOI: 10.1109/EUMA.1990.336053
S. Safavi-Naini, Sasan Ahmadi, Mehrdad Mosadeghi-Rad, Hamed Rouhbakhsh
{"title":"A Rigorous Procedure for Analysing Microwave Planar Printed Board Antenna Systems","authors":"S. Safavi-Naini, Sasan Ahmadi, Mehrdad Mosadeghi-Rad, Hamed Rouhbakhsh","doi":"10.1109/EUMA.1990.336053","DOIUrl":"https://doi.org/10.1109/EUMA.1990.336053","url":null,"abstract":"Based upon the generalization of the conventional models for printed board antenna elements and some recently formulated diffraction mechanisms, a genral scheme for analysing input characteristics, mutual effects, and radiation of planar antenna arrays has been developed. The method, as has been checked in practice, is especially suitable for higher microwave frequency band with potential of being generalized to millimeter wave region.","PeriodicalId":248044,"journal":{"name":"1990 20th European Microwave Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115657988","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Microwave Signals Processing and Forming using Dynamic Magnetostatic Waves Devices 用动态静磁波装置处理和形成微波信号
1990 20th European Microwave Conference Pub Date : 1990-10-01 DOI: 10.1109/EUMA.1990.336219
Y. Fetisov
{"title":"Microwave Signals Processing and Forming using Dynamic Magnetostatic Waves Devices","authors":"Y. Fetisov","doi":"10.1109/EUMA.1990.336219","DOIUrl":"https://doi.org/10.1109/EUMA.1990.336219","url":null,"abstract":"The possibilities of microwave signals processing and forming using magnetostatic waves (MSW) propagating in ferrite films are discussed. The principal characteristics of MSW controlled transmission line were studied experimentally. The methods of serrodyne shift and linear frequency modulation forming were discribed and new type of MSW mixer and signals compressor were proposed.","PeriodicalId":248044,"journal":{"name":"1990 20th European Microwave Conference","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116903303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
A Ka-Band Monopulse Radar using Focal Plane Array Technologyy 基于焦平面阵列技术的ka波段单脉冲雷达
1990 20th European Microwave Conference Pub Date : 1990-10-01 DOI: 10.1109/EUMA.1990.336153
N. Easton
{"title":"A Ka-Band Monopulse Radar using Focal Plane Array Technologyy","authors":"N. Easton","doi":"10.1109/EUMA.1990.336153","DOIUrl":"https://doi.org/10.1109/EUMA.1990.336153","url":null,"abstract":"A radar has been built to demonstrate Focal Plane Array Technology using a novel I.F. monopulse processor which is particularly appropriate to multibeam staring antennas. The front end of the radar consists of an array of thin film combined dipoles and receivers mounted on a lens such that each receiver produces a beam in the far field of the lens. Sixteen receivers are used to give a four by four cluster of beams. The outputs from these beams are fed to an I.F. network which combines them in such a way as to give three levels of monopulse outputs. A wide field of view with a coarse tracking slope can be selected, or a narrow field of view with a more accurate tracking slope, and also an intermediate state.","PeriodicalId":248044,"journal":{"name":"1990 20th European Microwave Conference","volume":"152 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127513198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
A New Extremely Wideband Lumped Six-Port Reflectometer 一种新型极宽带集总六端口反射计
1990 20th European Microwave Conference Pub Date : 1990-10-01 DOI: 10.1109/EUMA.1990.336275
V. Bilik, V. Raffaj, J. Bezek
{"title":"A New Extremely Wideband Lumped Six-Port Reflectometer","authors":"V. Bilik, V. Raffaj, J. Bezek","doi":"10.1109/EUMA.1990.336275","DOIUrl":"https://doi.org/10.1109/EUMA.1990.336275","url":null,"abstract":"The six-port reflectometer structure has been invented which may consist solely of lumped elements, is inherently dissipative but extremely broadband, covering bandwidths up to 3 decades of frequency. The contribution outlines the principle of operation of the device and presents some experiments with a GaAs monolithically integrated implementation operating in the frequency range 80 MHz - 7 GHz.","PeriodicalId":248044,"journal":{"name":"1990 20th European Microwave Conference","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124858691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 19
Analgesic Effects by Microwave Acupuncture Stimulation in Rabbits 微波针刺刺激家兔的镇痛作用
1990 20th European Microwave Conference Pub Date : 1990-10-01 DOI: 10.1109/EUMA.1990.336191
J. Teng, Danielle Vaniioenacker, A. Vander Vorst
{"title":"Analgesic Effects by Microwave Acupuncture Stimulation in Rabbits","authors":"J. Teng, Danielle Vaniioenacker, A. Vander Vorst","doi":"10.1109/EUMA.1990.336191","DOIUrl":"https://doi.org/10.1109/EUMA.1990.336191","url":null,"abstract":"Several investigators have reported that microwaves irradiation on animals (rabbits) produces alterations in the electroencephalogramn (EEG). The changes in EEG tracing, which is found in sleep or in anesthesia, were interpreted as the phenomena of inhibit ion of the higher nervous function (1). Many other experiences prove that inicrowave exposure can disturb the equilibrium between the processes of excitation and inhibition in the nervous system (2). The interaction with peripheral nerves is responsible for microwave-induced effects on the central nervous system (CNS) responses. An acupuncture point is an area where there are many peripheral nerve fibres and some special points can be stimulated to obtain analgesia effects. Applying microwaves to stimulate some acupuncture points, we observed that the pain threshold was significantly increased (3).","PeriodicalId":248044,"journal":{"name":"1990 20th European Microwave Conference","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126090271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
TRL Calibration Applied to the Measurement of Chip Transistor S-Parameters Up to 40 GHz TRL校准适用于高达40ghz的芯片晶体管s参数测量
1990 20th European Microwave Conference Pub Date : 1990-10-01 DOI: 10.1109/EUMA.1990.336046
L. Pradell, C. Sabater, E. Artal, A. Comerón, J. Bará, I. Corbella, J. Fortuny
{"title":"TRL Calibration Applied to the Measurement of Chip Transistor S-Parameters Up to 40 GHz","authors":"L. Pradell, C. Sabater, E. Artal, A. Comerón, J. Bará, I. Corbella, J. Fortuny","doi":"10.1109/EUMA.1990.336046","DOIUrl":"https://doi.org/10.1109/EUMA.1990.336046","url":null,"abstract":"The design of a Microstrip Test Fixture for TRL calibration, based on mobile, precisely positioned coax-to-microstrip transitions, is described. Experimental results for the measurement of GaAs FET and HEMT chips S-parameters in the 1-40 GHz frequency band are presented, and compared with the manufacturer's available data. Theoretical considerations and experimental results for the repeatability of transitions, based on a useful \"error box\" model, are also presented.","PeriodicalId":248044,"journal":{"name":"1990 20th European Microwave Conference","volume":"211 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122805922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
FET Modelling using an Analytic Extraction Method Based on Broadband S-Parameter Measurement 基于宽带s参数测量的场效应管解析提取方法建模
1990 20th European Microwave Conference Pub Date : 1990-10-01 DOI: 10.1109/EUMA.1990.336138
G. Kompa, F. Lin
{"title":"FET Modelling using an Analytic Extraction Method Based on Broadband S-Parameter Measurement","authors":"G. Kompa, F. Lin","doi":"10.1109/EUMA.1990.336138","DOIUrl":"https://doi.org/10.1109/EUMA.1990.336138","url":null,"abstract":"A fully analytical model parameter extraction with respect to microwave FET devices is under investigation using only \"hot\" scattering parameters over a wide frequency bandwidth. The stability of the proposed extraction algorithm is tested. Some preliminary extracted results from measured data are presented.","PeriodicalId":248044,"journal":{"name":"1990 20th European Microwave Conference","volume":"206 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114576158","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
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